INSPECTION 1.
Electrolyte inspection Battery electrolyte is normal when it is transparent. Check turbidity when inspecting the specific gravity. If it cannot be checked clearly, put the electrolyte in a beaker for inspection.
2.
Specific gravity inspection Use a hydrometer and measure the specific gravity of the electrolyte. Specific gravity upon full charge: ........................................1.280 [20°C (68"F)I Specific gravity upon end of discharge: ........................................I.I 50 [20°C (68"F)I The specific gravity of the electrolyte at 20°C (68°F)is used as the standard.
Equation for conversion S20 = St+0.0007 (t-20) S20= Specific gravity at 20°C St:Specific gravity measured at t°C t:Electrolyte temperature upon measurement (OC)
* How to use the hydrometer (1) Insert the nozzle of the hydrometer into the
(2)
(3)
electrolyte port and allow the electrolyte to be sucked into its outer tube. Let the hydrometer float correctly without contact with the outer tube, top or bottom, and read the scale at the highest point of the electrolyte surface as illustrated at left when the bubbles in the electrolyte disappear. After the measurement, wash the inside and outside of the hydrometer well with clear water and store it after wiping water off with clean cloth.